Cleaning mechanism for saw-gins.



No. 897,883. PATENTED SEPT. 8, 190's. 1.. a. DIGKSON. CLEANING MECHANISMFOR SAW GINS.

' APPLICATION FILED FEB. 12, 1908.

' UNITED STATES PATENT OFFICE.-

JAMES e. Dickson, OF LITZLLE ROCK, ARKANSAS.

useful Improvements in Cleaning Mechan CLEANING MECHANISM FOR SAW-G-INS.

Specification of Letters Patent.

Patented Sept. 8, 1908.

To all whom it may concern:

Be it known that I, JAMES G. DroKsoN, a citizen 0 the United States,residing at Little Rock, county of Pulaski, State of Arkansas, haveinvented certain new and isms for Saw-Grins; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

The object of the invention is to provide a mechanism whereby a draft ofair is directed along or in proximity to the periphery of the saws of asaw in, after the'latter have passed through the ri s of the gin for theurpose of separating and removing from t e cotton enlapped about theteeth of the saws, dust, motes, leaf trash, stubble, moisture or thelike contained in or incorporated with the lint, the draft of air beingconfined for this purpose in a relatively narrow duct, through the slotsin the front walls of which a portion of the peripheral edges of thesaws project after said saws havepassed the ribs.

In the accompanying drawings, Figure 1 is a vertical section through aportion of a iaw gin having my invention applied thereto.

ig. 2 is a similar view showing a modified construction of air duct.Figs. 3 and 4 are similar views showing further modifications,

and Fig. 5 is a perspective detail view of a convement form of damperfor regulating 4 the draft of air.-

Referring to Fig. 1 of the drawings, a indicates the gin saws whicharearranged in battery, as will be understood by those skilled in theart, each of said saws cooperat-.

ing with gin ribs 1) in the'well known manner. Extending rearwardly fromeach rib b is a curved tongue or projection clying adjacent to andpreferably conforming to the periphery of the saws, the end of saidtongue 0 extending to a point just above the horizontal axis of thesaws. Preferably, the sides of the tongues 0 lie quite close to thesides of the saw with just sufficient clearance between the parts topermit the saws to move freely in the slots thus formed between.adjacent ribs. At the oints where the tongues c join the ribs 1), t eslots are prefer ably made as wide as the distance between the ribs,inorder that the impurities or deleterious substances in the form ofdust,

' motes, or the like, will be permitted to pass through with the. lint,for a purpose to be hereinafter more fully described.

The tongues 0, together with the upper rear portions of the ribs formthe front wall of a duct (1 which curves upwardly and rearwardlyanddischarges into a dust chamber 9 adapted to receive the motes, leaftrash, stubble, moisture and the like, and to discharge the same throughan opening h located at one side of the gin frame. The opposite wall ofthe duct (1 is formed by a sheet or casing of iron, boards or the like,which extends transversely of the gin frame, to which it is secured atits ends. Preferably the front wall of the duct d, including the tongues0, will also be provided with a similar lining of sheet metal, boards orthe like, as indicated at e, which extends transversely of the gin frameand is slotted at its lower front ed e, as are the tongues c. It will beobserve that this construction provides a duct or series of ducts dopening into the dust chamber 9 located above and to the rear of thesaws and into which the peripheral edges of each of the saws projectafter passing through the gin ribs 1).

Located below the dust chamber 9 and exconstricted exit n opening intothe air duct (1 and serving to deliver a draft of air longitudinally ofsaid duct and therefore in a direction counter to the movement of thesaws in the passage of the latter through the duct d.

It is found in practice, that, in ginning uncleaned cotton, a relativelylarge amount of deleterious material in the form of motes, leaf trash,stubble, moisture or the like is so enmeshed or intimately associatedwith the cotton fiber that it passes through the ribs of the gin and isdelivered with the but to the lint flue and ultimately this deleteriousmaterial has to be removed from the lint. It is the purpose of myinvention to remove this deleterious material from the lint before thelatter is dofied from the saws. and to efiect this. a draft of air isdelivered by way of channel'i to duct cl into the duct 11 by theinjector-like action of in a direction counter to. the movement of thedirt, and the like, and of taking up the moisture and carrying the samealong duct (1 to the dust chamber. 9, without, however, re-

moving any of the lint, which, because of the counter-movement of theair blast, becomes more firmly enlapped about the teeth of the saws, aswill be ap arent from an inspection of the drawings. This draft of airmay be in the form of a positive blast from a blower or the like, or inthe form of an induced current set up by a suction fan or similar aparatus. In case a blast fan is employed, I fin it convenient to locatethe discharge nozzle thereof at a point to the rear of the air channel71, as at 8. When a suction or induced draft is employed, the suctionfan may be connected up with the outlet h in any appropriate manner toeffect the necessary draft through the.

channel 1' and duct 01.

In order to regulate the amount of the air draft to a nice adjustmentsufiicient to effect the purpose sought and without carrying oif any ofthe lint enlapped about the saw teeth, I preferably provide a suitabledamper mechanism at the rear end of air channel 71, which dampermechanism may conveniently take the form of two perforated plates Z andm, one of which is fixed and the other movable,

' the movable plate being adjusted longitudi- I nally of the fixed plateto bring the openings 11 into any desired degree of registry: order touse the same source of air for cleaning the lint and for doffing thelatter from the saws, the decking 7' may be extended to form a generallytriangular box-like struc-- ture running transversely of the gin bodyandcomprising a downwardly extending wall y"- and a curved upwardlyextending in Fig. 1 in t e construction of the air duct d motes, dustand the like in the s ace between the upper portion of the ribs and theI late 1;, the latter is interru ted near the ulpper bend to provide anopening (1 between e same and the continuation e thereof, which permits.any dust, motes or the like which collect behind the ribs 1) to be drawn.the movement of the saws to remove dirt the draft of air passing themouth of opening 11.

In the modification shown in Fig. 3, the

front wall e of the duct (1 is formed by a 'reversely curved plateattached to the u per front portion of the gin frame, as 'wi be readilyunderstood from the drawings. Said plate extends well down toward thehorizontal axis of the saws and forms a duct (1 of substantially thesame dimensions as the channel 01 shown in Fig. 1. The effect of thisprotutes an extension of the dust chamber 9 I with the slotted lowerends extending a relatively short distance between the saws, yet;

sufficient to cause the sawsto project into the channel d. The latterconstruction is particularly adapted to a suction draft of air for whichpurpose the suction fans may be connected 1n any appropriate manner withthe outlet h of the dust chamber.

What I claim is 1. A lint cleaning mechanism for saw gins, comprising adust chamber, a flue communicating with said chamber and into which arelatively small portion of the peripheral edges of the saws extend,.and' means for producing a draft of air in said flue counter tomoisture and the like from the lint.

2. A lint cleaning mechanism for saw gins, comprising a relativelynarrow flue into which the peripheries of the saws travel after passingthe ribs, and means for producing a draft of air in said flue counter tomovement of the saws to remove dirt,-moisture and the like from thelint.

3. A lint cleaning mechanism for saw gins, comprisin a flue runningtransversely of the battery 0 saws and having a slotted wall producin adraft-of air in said flue counter to through gulch the saws extend, andmeans for the move ent of the saws to removedirt,-'

moisture and the like from the lint.

4. Alint cleaning mechanism for saw gins, comprising a fluerunningtransversely of the battery of saws andhaving a slotted front wallthrough which the saws extend, and an air blast channel at the rear ofsaid flue and opening into the flue to direct a blast of air counter tothe movement of the saws in the flue and substantially tangential tosaid saws.

' 5. A lint'cleaning mechanism for saw gins,

comprising a flue running transversely of the battery of saws and havinga slotted front wall through which the saws extend, and an air blastchannel having a constricted exit at the rear of said flue and openinginto the flue to direct a blast of air'counter to the movement of thesaws in the flue and substantially tangential to said saws.

6. A lint cleaningmechanism for saw gins, comprising a relatively narrowflue into which the peripheries of the saws travel after passing theribs, means for producing a draft of air in said flue counter to themovement of I the saws to remove dirt, moisture and the l1ke from thehut, and means for regulating the force of the draft of air. I 7. A lintcleaning mechanism for saw gins,

comprising a flue running transversely of the battery of saws and havinga slotted front wall through which the saws extend, an air blast channelat the rear of said flue and opening into the flue to direct a blast ofair countcr to the movement of the saws in the flue and substantiallytangential to said saws, and a regul able damper in said blast channel.

In testimony whereof I aflix my signature, in presence of two witnesses.

JAMES G. DICKSON.

Witnesses:

ARTHUR L. BRYANT, JOHN C. NIEHOHON.

